Mc Call Subwatershed Site 32-1 Reservoir Report
Last Updated: December 14, 2025
Mc Call Subwatershed Site 32-1, located in Monona, Iowa, is a local government-owned structure designed by USDA SCS for fire protection, stock, or small fish pond purposes.
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Summary
Completed in 1963, this earth dam stands at 26 feet high with a length of 466 feet, providing a storage capacity of 50 acre-feet. Situated on TR-Little Sioux County Ditch, this dam plays a critical role in flood risk reduction within the region, with a low hazard potential and a moderate risk assessment rating.
Managed by the Iowa DNR, Mc Call Subwatershed Site 32-1 is subject to state regulation, permitting, inspection, and enforcement to ensure its structural integrity and functionality. The dam's spillway type is uncontrolled, and it has a surface area of 1.5 acres, serving a drainage area of 0.34 square miles. With a risk assessment rating of moderate (3), the dam's condition assessment is not rated, and its emergency action plan and inundation maps are yet to be prepared.
Overall, Mc Call Subwatershed Site 32-1 is a vital water resource infrastructure contributing to the local community's water management efforts. With its primary purpose of providing fire protection and supporting aquatic ecosystems, this dam stands as a testament to the collaborative efforts between local governments and federal agencies in safeguarding water resources and mitigating flood risks in the area.
Year Completed |
1963 |
Dam Length |
466 |
Dam Height |
26 |
River Or Stream |
TR-LITTLE SIOUX COUNTY DITCH |
Primary Dam Type |
Earth |
Surface Area |
1.5 |
Drainage Area |
0.34 |
Nid Storage |
50 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Maple River At Mapleton
|
323cfs |
West Fork Ditch At Hornick
|
80cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Missouri River At Decatur
|
14900cfs |
Soldier River At Pisgah
|
112cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Mc Call Subwatershed Site 32-1